Instrument for supplying constant currents of hot air.



PATENTED DEC. 5, 1905.

V. MONATH.

INSTRUMENT FOR SUPPLYING CONSTANT GURRENTS 0P HOT AIR.

APPLICATION FILED MAY 25, 19 05.

-/Jz 07912501: ZXZW//7W7% 41 V 5 26/ aasa'e-s'.

UNITED STATES PATENT OFFICE.

VICTOR MONATH, OF VIENNA, AUSTRIA-HUNGARY, ASSIGNOR TO EDUARD THOMAS, OFVIENNA, AUSTRIA-HUN GARY.

Specification of Letters Patent.

Patented Dec. 5, 1905.

Application filed May 25, 1905. Serial No. 262,288.

To ztZZ whom, it may concern:

Be it known that 1, Vision MoNATH, a citizen of the Empire ofAustria-Hungary, residing at Vienna, in the Empire of Austria-Hungary,have invented certain new and useful Improvements in the Construction ofInstruments for Supplying Constant Currents of Hot Air, of which thefollowing is a specification, reference being had therein to theaccompanying drawings.

The object of myinvention is the construction of an instrument to beused in dentistry for supplying a constant current of hot air.

My invention is based upon the well-known principle that a capsule ofplatina is kept in red-hot state by the constant passage of a mixture ofair and benzin.

The improvement consists in a device to regulate the flow of gases, soas to produce any desired degree of heat.

In carrying out my invention I inclose a platina capsule in a jacketending in a nozzle, so that the partly-burned gases when leaving thecapsule are collected in the jacket and will escape through the nozzlein a constant current. In order to permit varying the temperature ofthis current, provisions are made that part of the gas mixture may bebrought to escape through the nozzle without entering the red-hotplatina capsule.

In the annexed drawings an instrument constructed according to myinvention is shown, of which Figure 1 is a front elevation, and Fig. 2 alongitudinal section on a plane vertical to Fig. 1. Figs. 3 and 4 aresections on lines A B and C D of Fig. 2.

In all figures similar letters of reference indicate like parts.

The instrument essentially consists of a narrow tube 6, attached to themouth of a tube a, which supplies the mixture of air and benzin from aflexible tube m, fastened to the other end of the tube a. Over the freeend of the narrow tube Z) is placed a platina cap 0, provided with anorifice (Z. This cap 0 is attached to the end of the tube a and isinclosed in a wider tube g, which turns with one end upon the end of thetube a. At its other end,

above the cap 0, the tube 9 ends in a nozzle 2. To the tube 9 isfastened a sleeve f, which serves as a handle for turning the tube. Therotary movement of the tube g is limited by a pin k, attached to thetube a and engaging into a slit or recess 72. in the tube g. Above theshoulderp of the tube a, upon which rests the tube g, a second shoulderq is provided, and between the two the tube a is cutout or flattened,thereby removing a small segment of themetal, so that between the tubesat and g a small chamber w is formed, which communicates by a smallpassage 8 with the interior of the tube a.

To the inside of the tube g a ring 2? is attached in such manner that itrests upon the shoulder q and closes the chamber w in the side of thetube a. The ring at is provided with a sector-shaped aperture, which byturning the tube g may be brought in partial or full communication withthe chamber to in the manner of a valve, so that more or less of themixture of air and benzin may be permitted to escape from the tube athrough the passage 8 and tube 9 at the nozzle .2.

The tube 9 is provided with a small mica window a for observing theincandescence of the platina cap.

The instrument is used in the followin manner: The tube 9 is firstremoved, and the platina cap is made incandescent by any suitable flame.The tube 9 is now put on again, and the mixture of air and benzinsupplied through the tube a will ignite at the cap 0, thecombustion-gases escaping out through the nozzle .2. To regulate thetemperature of the gases escaping through the nozzle, the tube g, withthe ring 6, is turned by means of sleeve f so that either the whole oronly part of the mixture of air and benzin is driven through the cap 0.The more of this gaswhich travels through the passage 8 into the tube gwithout being ignited by the cap 0 the cooler will be the jet of gasescaping at the nozzle.

What I claim, and wish to secure by Letters Patent, is-

1. Dental instrument for supplying a jet of heated gas, comprising aplatina capsule adapted to be kept in incandescent state by a continuouscurrent of a mixture of air and benzin, a nozzle tube inclosing theplatina capsule, and provided with means to allow more or less of thegas mixture to pass outside of the platina capsule without combustion,substantially as described.

2. In a dental instrument for supplying a jet of heated gas thecombination with a platina capsule adapted to be kept in incanof a notchh in the lower edge of the nozzletube to limit its revolution with ringt, substantially as described and for the purpose set forth. I

In testimony whereof I hereunto affix my signature in presence ofwitnesses.

VICTOR MONATH.

Witnesses: v

ALvEsTo S. HOGUE, AUGUST FUGGER.

